user
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
What scientific fact could you use to explain this phenomenon?

### Input:
When a piece of paper with writing on it is frozen, the writing becomes harder to read.

### Response:
assistant
This phenomenon is the result of a scientific fact called the glass transition temperature. When a material is cooled below its glass transition temperature, it becomes brittle and can become unreadable due to cracking or fracturing.